What graphics card does it have? Please add the output of lspci -nn to your question. Have you installed proprietary drivers directly from the vendor (i.e. AMD or nvidia?)
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LekensteynMar 9 '12 at 22:34

Uninstall the nvidia-current package and restart the X server (by rebooting for example). Your laptop is supposed to have a nVidia card (Optimus though). Your BIOS is configured to use the integrated card only. If you wish to have on-demand use of the graphics card (keeping the discrete nVidia card off at other times), have a look at Bumblebee as mentioned in How well do laptops with Nvidia Optimus work?